WMD Guns Nickel Boron X Bolt Carrier Group - NIBXBCG

WMD NiB-X Coating Bolt Carrier Group NiB-X Coating Nickel Boron Coating. Harder than Tennifer, Melonite, Nickel Teflon and Hard Chrome (NiB-X is Rc72). Environmental corrosion protection. Very lubricious (CoF .07). Easier to clean - wipes clean in most cases. Less maintenance - longer usage between cleaning cycles and enhanced performance. Lifetime warranty from chipping, flaking or wear. Drops into AR15/M16 Rifles without any Gunsmithing! Full Auto Carrier will function in any semi automatic rifle *BCG's are received and shipped in bulk packing*Some BCG's that have been receiving in are the traditional "round" carrier rather than the faceted as indicated in the picture. All carriers are NiB coated and are of the same quality.